What do wavelet packet functions look like

1 What do wavelet packet functions look like  

Before we answer the question addressing this section, we probably need to take a brief look at wavelet packet functions from the continuous side. 

Unlike representation of functions using wavelet basis functions, there are many different combinations of wavelet packet basis functions that can be used in signal representation. Hence there is some degree of redundancy. With redundancy comes choice, and Section 3 discusses one approach for selecting a set of basis functions. 

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